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Skeletal Radiology
Erschienen in: Skeletal Radiology 10/2013

01.10.2013 | Scientific Article

Water-content calculation in growth plate and cartilage using MR T1-mapping design and validation of a new method in a porcine model

verfasst von: J. M. Shiguetomi-Medina, M. Gottliebsen, M. S. Kristiansen, S. Ringgaard, H. Stødkilde-Jørgensen, O. Rahbek, B Møller-Madsen

Erschienen in: Skeletal Radiology | Ausgabe 10/2013

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Abstract

Objective

There is a close relation between cartilage health and its hydration state. Current magnetic resonance methods allow visualizing this tissue. However, a quantitative analysis is more useful when studying disease. The purpose of this study was to quantify water content in cartilage using magnetic resonance without contrast agents.

Materials and methods

Water-content estimations using T1 magnetic resonance mapping were done first in eight gelatin samples where the water content was previously known. The same method was used in the physeal areas of eight skeletally immature 30-kg pigs. To calculate accuracy, T1 calculations were compared to dry-freeze, which is considered the gold standard because it can remove the total water content form a tissue. Four fresh cartilage and seven gelatin samples were dry-frozen. Water content obtained from dry-freeze was compared to the one calculated from T1 map values. A mathematical model and statistical analysis were used to calculate the predictive value of the method and its significance.

Results

T1-map-based magnetic resonance method can calculate water content in cartilage with an accuracy of 97.3 %. We calculated a coefficient of variance for this method against dry-frozen sample of 3.68 (SD = 1.2) in gelatin samples, and 2.73 (SD = 1.3) in in vivo samples. Between two independent observers, the coefficient of variance was 0.053, which suggests it can be easily reproduced.

Conclusions

Magnetic resonance was able to calculate, with high accuracy, the cartilage water content using T1 mapping sequences.
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Metadaten
Titel
Water-content calculation in growth plate and cartilage using MR T1-mapping design and validation of a new method in a porcine model
verfasst von
J. M. Shiguetomi-Medina
M. Gottliebsen
M. S. Kristiansen
S. Ringgaard
H. Stødkilde-Jørgensen
O. Rahbek
B Møller-Madsen
Publikationsdatum
01.10.2013
Verlag
Springer Berlin Heidelberg
Erschienen in
Skeletal Radiology / Ausgabe 10/2013
Print ISSN: 0364-2348
Elektronische ISSN: 1432-2161
DOI
https://doi.org/10.1007/s00256-013-1674-8

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